U.S. patent number 10,965,137 [Application Number 15/812,575] was granted by the patent office on 2021-03-30 for charging device and charging method thereof.
This patent grant is currently assigned to CYBER POWER SYSTEMS, INC.. The grantee listed for this patent is CYBER POWER SYSTEMS, INC.. Invention is credited to Heng-Chuan Chen, Lien-Hsun Ho, Che-Wei Liang.
United States Patent |
10,965,137 |
Ho , et al. |
March 30, 2021 |
Charging device and charging method thereof
Abstract
A charging device including a converter and a controller coupled
with the converter is provided. The charging device is suitable for
charging to an electronic device having a rated input voltage
value. The converter can receive a power. Wherein, the controller
makes the converter to output a first charging voltage value to the
electronic device. The first charging voltage value is greater than
the rated input voltage value of the electronic device. Further, a
charging method of the charging device is provided.
Inventors: |
Ho; Lien-Hsun (Taipei,
TW), Chen; Heng-Chuan (Taipei, TW), Liang;
Che-Wei (Taipei, TW) |
Applicant: |
Name |
City |
State |
Country |
Type |
CYBER POWER SYSTEMS, INC. |
Taipei |
N/A |
TW |
|
|
Assignee: |
CYBER POWER SYSTEMS, INC.
(Taipei, TW)
|
Family
ID: |
1000005456543 |
Appl.
No.: |
15/812,575 |
Filed: |
November 14, 2017 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20190089165 A1 |
Mar 21, 2019 |
|
Foreign Application Priority Data
|
|
|
|
|
Sep 15, 2017 [CN] |
|
|
201710831178.4 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H02J
7/007 (20130101); H02J 7/00 (20130101) |
Current International
Class: |
H02J
7/00 (20060101) |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Williams; Arun C
Attorney, Agent or Firm: Bacon & Thomas, PLLC
Claims
What is claimed is:
1. A charging device used for charging to an electronic device,
wherein the electronic device has a rated input voltage value,
comprising: a converter, receiving a power; and a controller,
coupled to the converter; wherein, the controller makes the
converter output a first charging voltage value to the electronic
device, the first charging voltage value being greater than the
rated input voltage value; wherein when the electronic device is
charged, the electronic device has a maximum charging current
value; and wherein when an instant charging current value of the
electronic device is smaller than the maximum charging current
value and the difference between the instant charging current
values of the electronic device within a predetermined time is
greater than a predetermined proportion of the maximum charging
current value, or when an instant charging current value of the
electronic device is smaller than the predetermined proportion of
the maximum charging current value, the first charging voltage
value outputted by the converter is adjusted to a second charging
voltage value by activation of the controller.
2. The charging device of claim 1, wherein the first charging
voltage value is the upper limit value of input voltage which the
electronic device can tolerate or at least 1.03 times the rated
input voltage value.
3. The charging device of claim 1, further comprising a connecting
wire and a first electrically connected terminal, and the
electronic device has a second electrically connected terminal, the
connecting wire is coupled between the first electrically connected
terminal and the second electrically connected terminal, wherein
the first charging voltage value is a sum of the upper limit value
of input voltage which the electronic device can tolerate and the
voltage drop of the connecting wire.
4. The charging device of claim 3, wherein there is no any message
transmitted between the first electrically connected terminal and
the second electrically connected terminal.
5. The charging device of claim 1, further comprising a feedback
circuit and a PWM controller, the PWM controller is coupled to the
converter, and the feedback circuit is coupled between the
controller and the PWM controller.
6. The charging device of claim 5, wherein the converter has an
input terminal and an output terminal, the feedback circuit is
coupled between the output terminal and a ground terminal, the
feedback circuit has a first resistor and a second resistor, the
first resistor is coupled to the output terminal, and the second
resistor is coupled between the first resistor and the ground
terminal.
7. The charging device of claim 6, further comprising a third
resistor coupled between a first node and the ground terminal,
wherein the first node is coupled between the controller and the
first electrically connected terminal.
8. The charging device of claim 6, wherein the controller is
coupled to the output terminal for detecting the voltage value
outputted by the converter, the feedback circuit generates a
feedback signal according to the voltage value outputted by the
converter, and the PWM controller detects the feedback signal for
controlling the output voltage value of the converter.
9. The charging device of claim 6, wherein a second node is coupled
between the controller and the PWM controller, and the second node
is coupled between the first resistor and the second resistor.
10. A charging method, comprising: providing a charging device, the
charging device including a controller and a converter, wherein the
controller is coupled to the converter, and the converter receives
a power; and making the charging device couple to an electronic
device for charging, wherein the electronic device has a rated
input voltage value; wherein the controller makes the converter
output a first charging voltage value to the electronic device, the
first charging voltage value being greater than the rated input
voltage value; wherein when the electronic device is charged by the
charging device, the electronic device has a maximum charging
current value; and wherein when an instant charging current value
of the electronic device is smaller than the maximum charging
current value and the difference between the instant charging
current values of the electronic device within a predetermined time
is greater than a predetermined proportion of the maximum charging
current value, or when an instant charging current value of the
electronic device is smaller than the predetermined proportion of
the maximum charging current value, the first charging voltage
value outputted by the converter is adjusted to a second charging
voltage value by activation of the controller.
11. The charging method of claim 10, wherein the first charging
voltage value is the upper limit value of input voltage which the
electronic device can tolerate or at least 1.03 times the rated
input voltage value.
12. The charging method of claim 10, wherein the charging device
further includes a connecting wire and a first electrically
connected terminal, and the electronic device has a second
electrically connected terminal, the connecting wire is coupled
between the first electrically connected terminal and the second
electrically connected terminal, the first charging voltage value
is a sum of the upper limit value of input voltage which the
electronic device can tolerate and the voltage drop of the
connecting wire.
13. The charging method of claim 12, wherein there is no any
message transmitted between the first electrically connected
terminal and the second electrically connected terminal.
14. The charging method of claim 10, wherein the charging device
further includes a feedback circuit and a PWM controller, the PWM
controller is coupled to the converter, and the feedback circuit is
coupled between the controller and the PWM controller.
15. The charging method of claim 14, wherein the converter has an
input terminal and an output terminal, the feedback circuit is
coupled between the output terminal and a ground terminal, the
feedback circuit has a first resistor and a second resistor, the
first resistor is coupled to the output terminal, and the second
resistor is coupled between the first resistor and the ground
terminal.
16. The charging method of claim 15, wherein the charging device
further includes a third resistor coupled between a first node and
the ground terminal, the first node is coupled between the
controller and the first electrically connected terminal.
17. The charging method of claim 15, wherein the controller is
coupled to the output terminal for detecting the voltage value
outputted by the converter, the feedback circuit generates a
feedback signal according to the voltage value outputted by the
converter, and the PWM controller detects the feedback signal for
controlling the output voltage value of the converter.
18. The charging method of claim 15, wherein a second node is
coupled between the controller and the PWM controller, and the
second node is coupled between the first resistor and the second
resistor.
19. A charging device used for charging to an electronic device,
wherein the electronic device has a rated input voltage value,
comprising: a converter, receiving a power; and a controller,
coupled to the converter; wherein, the controller makes the
converter output a first charging voltage value to the electronic
device, the first charging voltage value being greater than the
rated input voltage value; wherein when the electronic device is
charged, the electronic device has a maximum charging current
value; and wherein when an instant charging current value of the
electronic device is smaller than the maximum charging current
value and the difference between the instant charging current
values of the electronic device within a predetermined time is
greater than a first predetermined proportion of the maximum
charging current value, or when an instant charging current value
of the electronic device is smaller than a second predetermined
proportion of the maximum charging current value, the first
charging voltage value outputted by the converter is adjusted to a
second charging voltage value by activation of the controller.
20. The charging device of claim 19, wherein the first charging
voltage value is the upper limit value of input voltage which the
electronic device can tolerate or at least 1.03 times the rated
input voltage value.
21. The charging device of claim 19, further comprising a
connecting wire and a first electrically connected terminal, and
the electronic device has a second electrically connected terminal,
the connecting wire is coupled between the first electrically
connected terminal and the second electrically connected terminal,
wherein the first charging voltage value is a sum of the upper
limit value of input voltage which the electronic device can
tolerate and the voltage drop of the connecting wire.
22. The charging device of claim 21, wherein there is no any
message transmitted between the first electrically connected
terminal and the second electrically connected terminal.
23. The charging device of claim 19, further comprising a feedback
circuit and a PWM controller, the PWM controller is coupled to the
converter, and the feedback circuit is coupled between the
controller and the PWM controller.
24. The charging device of claim 23, wherein the converter has an
input terminal and an output terminal, the feedback circuit is
coupled between the output terminal and a ground terminal, the
feedback circuit has a first resistor and a second resistor, the
first resistor is coupled to the output terminal, and the second
resistor is coupled between the first resistor and the ground
terminal.
25. The charging device of claim 24, further comprising a third
resistor coupled between a first node and the ground terminal,
wherein the first node is coupled between the controller and the
first electrically connected terminal.
26. The charging device of claim 24, wherein the controller is
coupled to the output terminal for detecting the voltage value
outputted by the converter, the feedback circuit generates a
feedback signal according to the voltage value outputted by the
converter, and the PWM controller detects the feedback signal for
controlling the output voltage value of the converter.
27. The charging device of claim 24, wherein a second node is
coupled between the controller and the PWM controller, and the
second node is coupled between the first resistor and the second
resistor.
28. A charging method, comprising: providing a charging device, the
charging device including a controller and a converter, wherein the
controller is coupled to the converter, and the converter receives
a power; and making the charging device couple to an electronic
device for charging, wherein the electronic device has a rated
input voltage value, wherein the controller makes the converter
output a first charging voltage value to the electronic device, the
first charging voltage value being greater than the rated input
voltage value; wherein when the electronic device is charged by the
charging device, the electronic device has a maximum charging
current value; and wherein when an instant charging current value
of the electronic device is smaller than the maximum charging
current value and the difference between the instant charging
current values of the electronic device within a predetermined time
is greater than a first predetermined proportion of the maximum
charging current value, or when an instant charging current value
of the electronic device is smaller than a second predetermined
proportion of the maximum charging current value, the first
charging voltage value outputted by the converter is adjusted to a
second charging voltage value by activation of the controller.
29. The charging method of claim 28, wherein the first charging
voltage value is the upper limit value of input voltage which the
electronic device can tolerate or at least 1.03 times the rated
input voltage value.
30. The charging method of claim 28, wherein the charging device
further includes a connecting wire and a first electrically
connected terminal, and the electronic device has a second
electrically connected terminal, the connecting wire is coupled
between the first electrically connected terminal and the second
electrically connected terminal, the first charging voltage value
is a sum of the upper limit value of input voltage which the
electronic device can tolerate and the voltage drop of the
connecting wire.
31. The charging method of claim 30, wherein there is no any
message transmitted between the first electrically connected
terminal and the second electrically connected terminal.
32. The charging method of claim 28, wherein the charging device
further includes a feedback circuit and a PWM controller, the PWM
controller is coupled to the converter, and the feedback circuit is
coupled between the controller and the PWM controller.
33. The charging method of claim 32, wherein the converter has an
input terminal and an output terminal, the feedback circuit is
coupled between the output terminal and a ground terminal, the
feedback circuit has a first resistor and a second resistor, the
first resistor is coupled to the output terminal, and the second
resistor is coupled between the first resistor and the ground
terminal.
34. The charging method of claim 33, wherein the charging device
further includes a third resistor coupled between a first node and
the ground terminal, the first node is coupled between the
controller and the first electrically connected terminal.
35. The charging method of claim 33, wherein the controller is
coupled to the output terminal for detecting the voltage value
outputted by the converter, the feedback circuit generates a
feedback signal according to the voltage value outputted by the
converter, and the PWM controller detects the feedback signal for
controlling the output voltage value of the converter.
36. The charging method of claim 33, wherein a second node is
coupled between the controller and the PWM controller, and the
second node is coupled between the first resistor and the second
resistor.
Description
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to a charging device and a charging
method thereof, and more particularly, the present invention is
relates to a charging device and a charging method thereof with
quick charging function.
Description of Related Art
Portable devices are ubiquitous in present day. People use portable
devices for performing variety of such as wireless communication,
data computing, surfing the Internet, running specialised
applications, gaming, etc. Portable devices include but are not
limited to mobile phones, tablet computers, laptop PC's, PDA's,
etc.
Due to the size of these portable devices, the power source for
these devices, e.g., an internal battery, is often small and of
limited capacity. As a result, the battery of a portable device may
have to be frequently charged in order to keep the portable device
operational. Thus, the charging speed of the charging device of the
portable device is very important.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a
charging device and a charging method thereof for charging
quickly.
To achieve the foregoing and other objects, a charging device is
provided. The charging device is used for charging to an electronic
device. The electronic device has a rated input voltage value. The
charging device includes a converter and a controller. The
converter can receive a power. The controller is coupled to the
converter. Wherein, the controller makes the converter output a
first charging voltage value to the electronic device, the first
charging voltage value is greater than the rated input voltage
value.
In one embodiment of the present invention, the first charging
voltage value is the upper limit value of input voltage which the
electronic device can tolerate or at least 1.03 times the rated
input voltage value.
In one embodiment of the present invention, the charging device
further includes a connecting wire and a first electrically
connected terminal, and the electronic device has a second
electrically connected terminal, the connecting wire is coupled
between the first electrically connected terminal and the second
electrically connected terminal, wherein the first charging voltage
value is a sum of the upper limit value of input voltage which the
electronic device can tolerate and the voltage drop of the
connecting wire.
In one embodiment of the present invention, there is no any message
transmitted between the first electrically connected terminal and
the second electrically connected terminal.
In one embodiment of the present invention, when the electronic
device is charged by the charging device, the electronic device has
a maximum charging current value; when a instant charging current
value of the electronic device is smaller than the maximum charging
current value and the difference between the instant charging
current values of the electronic device within a predetermined time
is greater than a predetermined proportion of the maximum charging
current value, or when a instant charging current value of the
electronic device is smaller than the predetermined proportion of
the maximum charging current value, the first charging voltage
value outputted by the converter is adjusted to a second charging
voltage value by activation of the controller.
In one embodiment of the present invention, when the electronic
device is charged by the charging device, the electronic device has
a maximum charging current value; when a instant charging current
value of the electronic device is smaller than the maximum charging
current value and the difference between the instant charging
current values of the electronic device within a predetermined time
is greater than a first predetermined proportion of the maximum
charging current value, or when a instant charging current value of
the electronic device is smaller than a second predetermined
proportion of the maximum charging current value, the first
charging voltage value outputted by the converter is adjusted to a
second charging voltage value by activation of the controller.
In one embodiment of the present invention, the charging device
further includes a feedback circuit and a PWM controller, the PWM
controller is coupled to the converter, and the feedback circuit is
coupled between the controller and the PWM controller.
In one embodiment of the present invention, the converter has an
input terminal and an output terminal, the feedback circuit is
coupled between the output terminal and a ground terminal, the
feedback circuit has a first resistor and a second resistor, the
first resistor is coupled to the output terminal, and the second
resistor is coupled between the first resistor and the ground
terminal.
In one embodiment of the present invention, the charging device
further includes a third resistor coupled between a first node and
the ground terminal, wherein the first node is coupled between the
controller and the first electrically connected terminal.
In one embodiment of the present invention, the controller is
coupled to the output terminal for detecting the voltage value
outputted by the converter, the feedback circuit generates a
feedback signal according to the voltage value outputted by the
converter, and the PWM controller detects the feedback signal for
controlling the output voltage value of the converter.
In one embodiment of the present invention, a second node is
coupled between the controller and the PWM controller, and the
second node is coupled between the first resistor and the second
resistor.
In the present invention, a charging method is further provided,
which including the following steps:
providing a charging device, the charging device includes a
controller and a converter, wherein the controller is coupled to
the converter, and the converter receives a power;
making the charging device couple to an electronic device for
charging, wherein the electronic device has a rated input voltage
value; and
the controller makes the converter output a first charging voltage
value to the electronic device, wherein the first charging voltage
value is greater than the rated input voltage value.
BRIEF DESCRIPTION OF THE DRAWINGS
Other features and advantages of the present invention will become
apparent in the following detailed description of the preferred
embodiments with reference to the accompanying drawings, of
which:
FIG. 1 is a schematic view illustrating a charging device and an
electronic device according to one embodiment of the present
invention.
FIG. 2 is a flow chart illustrating a charging method of charging
device according to one embodiment of the present invention.
DESCRIPTION OF EMBODIMENTS
The characteristics, contents, advantages and achieved effects of
the present disclosure will become more fully understood from the
detailed description given herein below and the accompanying
drawings which are given by way of illustration only, and thus are
not limitative of the present disclosure.
As required, detailed embodiments are disclosed herein. It must be
understood that the disclosed embodiments are merely exemplary of
and may be embodied in various and alternative forms, and
combinations thereof. As used herein, the word "exemplary" is used
expansively to refer to embodiments that serve as illustrations,
specimens, models, or patterns. The figures are not necessarily to
scale and some features may be exaggerated or minimized to show
details of particular components. In other instances, well-known
components, systems, materials, or methods that are known to those
having ordinary skill in the art have not been described in detail
in order to avoid obscuring the present disclosure. Therefore,
specific structural and functional details disclosed herein are not
to be interpreted as limiting, but merely as a basis for the claims
and as a representative basis for teaching one skilled in the
art.
FIG. 1 is a schematic view illustrating a charging device and an
electronic device according to one embodiment of the present
invention. Referring to FIG. 1, a charging device 100 of the
present embodiment is suitable for charging to an electronic device
200. The electronic device 200 has a rated input voltage value. The
charging device 100 includes a converter 110 and a controller 120.
The converter 110 has an input terminal 111 and an output terminal
112, for example. The converter 110 can receive a power Vin through
the input terminal 111. The controller 120 is, for example, coupled
to the output terminal 112 of the converter 110. In addition, the
electronic device 200 includes, for example, a charge controller
210 and a battery 220.
Worth mention, in the present embodiment, the controller 120 can
make the converter 110 output a first charging voltage value to the
electronic device 200, and the first charging voltage value is
greater than the rated input voltage value. Wherein, the first
charging voltage value is, for example, the upper limit value of
input voltage which the electronic device 200 can tolerate or at
least 1.03 times the rated input voltage value. For example, the
first charging voltage value can be the upper limit value of input
voltage which the electronic device 200 can tolerate. Besides, the
first charging voltage value also can be 1.03-1.1 times the rated
input voltage value of the electronic device 200. In addition, the
electronic device 200 can be a mobile phone. The rated input
voltage value of the mobile phone is, for example, 5V. Thus, the
first charging voltage value of the present embodiment is, for
example, 5.25V. Wherein, the electronic device of the present
embodiment is exemplified as the mobile phone, and the present
invention will not be limited to this.
In addition, in the present embodiment, the charging device 100
further can include a connecting wire 130 and a first electrically
connected terminal 140. The electronic device 200 has, for example,
a second electrically connected terminal 230. The connecting wire
130 is coupled between the first electrically connected terminal
140 and the second electrically connected terminal 230. Wherein,
the first charging voltage value also can be a sum of the upper
limit value of input voltage which the electronic device 200 can
tolerate and the voltage drop at connecting wire 130. Where the
first charging voltage value is greater than the rated input
voltage value of the charging device 100 is within the spirit and
scope of the present invention, and is not intended to be limiting
herein.
On the other hand, in the present embodiment, when the charging
device 100 is used to charge for the electronic device 200, the
electronic device 200 has, for example, a maximum charging current
value. The maximum charging current value is, for example, a
maximum current value detected during the charging time. Thus, when
one instant charging current value of the electronic device 200 is
smaller than the maximum charging current value and the difference
between the instant charging current values of the electronic
device 200 within a predetermined time is greater than a
predetermined proportion of the maximum charging current value, the
first charging voltage value outputted by the converter 110 is
adjusted to a second charging voltage value by activation of the
controller 120. The level of the second charging voltage value can
be set according to the actual demand. In other words, the second
charging voltage value can be greater than the first charging
voltage value or smaller than the first charging voltage value.
Even, the second charging voltage value can be smaller than the
first charging voltage value and the rated input voltage value. For
example, when one instant charging current value of the electronic
device 200 is smaller than a predetermined proportion (the range of
predetermined proportion is, for example, between 0.4-0.6 times) of
maximum charging current value and the difference between the
instant charging current values of the electronic device 200 within
a predetermined time is greater than another predetermined
proportion (this range of predetermined proportion is, for example,
between 0.1-0.2 times) maximum charging current value, the
controller 120 can activate the converter 110. Thus, the first
charging voltage value can be dropped to a second charging voltage
value. At this time, the second charging voltage value, is for
example, 0.9-0.97 times rated input voltage value of the electronic
device 200. Therefore, the effect of energy saving can be achieved.
One more practical example is that: when the electronic device 200
such as mobile phone is charged by the charging device 100 in
5.25V, the first charging voltage value outputted by the converter
110 will be dropped to a second charging voltage value by
activation of the controller 120 if the instant charging current
value of the electronic device 200 is smaller than 0.8 .ANG. and
the difference between the instant charging current values of the
mobile phone before and after 10 minutes is greater than 0.3 .ANG..
Wherein, the first charging voltage value is, for example, 5.25V.
The second charging voltage value is, for example, 4.8V.
In one preferred embodiment, when one instant charging current
value of the electronic device 200 is smaller than the foregoing
proportion (this range of foregoing proportion is, for example,
between 0.1-0.2 times) maximum charging current value, or when one
instant charging current value of the electronic device 200 is
smaller than another proportion (this range of proportion is, for
example, 0.3 times) maximum charging current value, the first
charging voltage value outputted by the converter 110 also can
adjusted to a second charging voltage value through the activation
of the controller 120. Similarly, the level of the second charging
voltage value can be set according to the actual demand. In other
words, the second charging voltage value can be greater than the
first charging voltage value. Besides, the second charging voltage
value also can be smaller than the first charging voltage value.
Even, the second charging voltage value can be smaller than the
first charging voltage value and the rated input voltage value. For
example, the second charging voltage value can be 0.9-0.97 times
rated input voltage value of the electronic device 200. One more
practical example is that: when the electronic device 200 such as
mobile phone is charged by the charging device 100 in 5.25V, the
first charging voltage value outputted by the converter 110 will be
dropped to a second charging voltage value by activation of the
controller 120 if the instant charging current value of the
electronic device 200 is smaller than 0.3 .ANG.. Wherein, the first
charging voltage value is, for example, 5.25V. The second charging
voltage value is, for example, 4.8V. Besides, the above state which
the first charging voltage value outputted by the converter 110
drops to the second charging voltage value is, for example, the
charging state of the electronic device 200 which has been
completed by nearly 80% to 90%. It is understood that the above
description is for exemplary only, and the present invention is not
limited thereto.
In the present embodiment, the charging device 100 further includes
a feedback circuit 150 and a PWM controller 160. In the present
embodiment, the PWM controller 160 is coupled to the converter 110,
and the feedback circuit 150 is coupled between the controller 120
and the PWM controller 160. In addition, the feedback circuit 150
is coupled between the output terminal 112 of the converter 110 and
a ground terminal.
From above, the feedback circuit 150 of the present embodiment has
a first resistor R1 and a second resistor R2. The first resistor R1
is coupled to the output terminal 112, and the second resistor R2
is coupled between the first resistor R1 and the ground terminal.
Further, in the present embodiment, a second node N2 is coupled
between the first resistor R1 and the second resistor R2. The
second node is also coupled between the controller 120 and the PWM
controller 160.
Worth mention, in the present embodiment, the controller 120 is
coupled to the output terminal 112 of the converter 110. For
example, the controller 120 is coupled to the output terminal 112
of the converter 110 through one resistor. Thus, the controller 120
can detect the voltage value outputted by the converter 110. The
feedback circuit 150 can generate a feedback signal according to
the voltage value outputted by the converter 110. Further, the PWM
controller 160 can control the output voltage value Vout outputted
by the converter 110 according to the feedback signal. In the
present embodiment, when the controller 120 determines that the
output voltage value Vout outputted by the converter 110 is lower
than a default outputting target-level voltage (like 5.25V), the
controller 120 will output a voltage to the second node N2. At this
time, the output voltage of the controller 120 is smaller than the
partial voltage at second node N2 for lowering the voltage at the
second node N2. Further, the PWM controller 160 can control the
converter 110 to raise its output voltage value Vout. On the
contrary, when the controller 120 determines that the output
voltage value Vout of the converter 110 is higher than the default
outputting target-level voltage (like 5.25V), the controller 120
will outputs one voltage to the second node N2. At this time, the
output voltage of the controller 120 is greater than the partial
voltage at second node N2 for raising the voltage at the second
node N2. Further, the PWM controller 160 can control the converter
110 to lower its output voltage value Vout.
In the present embodiment, the charging device 100 further can
include a third resistor R3. The third resistor R3 is coupled
between a first node N1 and the ground terminal, and the first node
N1 is coupled between the controller 120 and the first electrically
connected terminal 140. Therefore, in the controller 120 of the
present embodiment, the instant charging current value of the
electronic device 200 can be obtained through detecting the voltage
at first node N1.
In one embodiment, there is no any message transmitted between the
first electrically connected terminal 140 and the second
electrically connected terminal 230. For example, only pin VCC and
pin GND are configured in the first electrically connected terminal
140. In other words, there is no pin like D+ or D- for transmitting
any message or communication. In other embodiment. The first
electrically connected terminal 140 also can be configured with
other pins expect pin VCC and pin GND, wherein these pins are dummy
pins without transmitting or communicating function. In another
preferred embodiment, the foregoing pins also can be applied in
identifying mechanism for charging to the electronic device 200,
and the present invention will not be limited to this.
Worth mention, the converter 110 can be a AC/DC converter, such as
a flyback converter. In addition, the converter 110 also can be
DC/DC converter, such as a buck converter, a boost converter, or a
buck-boost converter etc.
FIG. 2 is a flow chart illustrating a charging method of charging
device according to one embodiment of the present invention.
Referring to FIG. 2, the charging method of the present embodiment
includes the following steps: Firstly, in step S210, providing a
charging device, the charging device includes a controller and a
converter. Wherein, the controller is coupled to the converter, and
the converter 110 can receives a power. Next, in S220, making the
charging device couple to the electronic device for charging,
wherein the electronic device has a rated input voltage value.
Next, in S230, the controller makes the converter output a first
charging voltage value to the electronic device, wherein the first
charging voltage value is greater than the rated input voltage
value.
Worth mention, in the charging method of the present invention,
when one instant charging current value of the electronic device
200 is smaller than the maximum charging current value and the
difference between instant charging current values of the
electronic device 200 within a predetermined time is greater than a
predetermined proportion of maximum charging current value, the
first charging voltage value outputted by the converter 110 will be
adjusted to a second charging voltage value by activation of the
controller 120. Besides, when one instant charging current value of
the electronic device 200 is smaller than the predetermined
proportion of maximum charging current value or when one instant
charging current value of the electronic device 200 is smaller than
another predetermined proportion of maximum charging current value,
the first charging voltage value outputted by the converter 110
also can be adjusted to the second charging voltage value by
activation of the controller 120.
Specifically, in the charging device 100 of the present embodiment,
the rated input voltage value of the electronic device 200 can be
obtained through external set or internal sense. For example, users
can set the rated input voltage value of the electronic device 200
in the charging device 100 according to operating specification of
the electronic device 200. In one embodiment, the rated input
voltage value of the electronic device 200 has been pre-set in the
charging device 100. Certainly, the charging device 100 can be
configured with a sensing device (not shown) for sensing the rated
input voltage value of the electronic device 200 automatically when
the charging device 100 and the electronic device 200 are coupled.
It is understood that the above description is for exemplary only,
and the present invention is not limited thereto.
To sum up, in the charging device of the present invention, the
first charging voltage value is used to charge for the electronic
device, wherein the first charging voltage value outputted by the
converter is greater than the rated input voltage value of the
electronic device. Further, the purpose of quick charge can be
achieved. In addition, in the charging device of the present
invention, when the instant charging current value of the
electronic device is smaller than the maximum charging current
value and the difference between instant charging current values of
the electronic device within the predetermined time is greater than
a predetermined proportion of maximum charging current value, the
first charging voltage value outputted by the converter will be
adjusted to the second charging voltage value. Besides, when the
instant charging current value of the electronic device is smaller
than the predetermined proportion of maximum charging current value
or the instant charging current value of the electronic device is
smaller than another predetermined proportion of maximum charging
current value, the first charging voltage value outputted by the
converter also can be adjusted to the second charging voltage
value.
While the disclosure has been described by way of example and in
terms of the preferred embodiments, it is to be understood that the
disclosure is not limited to the disclosed embodiments. To the
contrary, it is intended to cover various modifications and similar
arrangements (as would be apparent to those skilled in the art).
Therefore, the scope of the appended claims should be accorded the
broadest interpretation so as to encompass all such modifications
and similar arrangements.
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